EUVD-2025-201302Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
High privileges required to store payload (PR:H), victim interaction required to trigger (UI:R), scope changes to victim browser (S:C), low C and I impact only.
Primary rating from Vendor (5d1c2695-1a31-4499-88ae-e847036fd7e3).
CVSS VectorVendor: 5d1c2695-1a31-4499-88ae-e847036fd7e3
Lifecycle Timeline
4DescriptionCVE.org
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (ConnectWise Technology Integration module) allows Stored XSS.This issue affects Fireware OS 12.4 up to and including 12.11.4, 12.5 up to and including 12.5.13, and 2025.1 up to and including 2025.1.2.
AnalysisAI
Stored cross-site scripting in WatchGuard Fireware OS's ConnectWise Technology Integration module enables a high-privileged attacker to persist malicious scripts that execute in other users' browsers upon page load. Affected versions span three release branches: Fireware OS 12.4 through 12.11.4, 12.5 through 12.5.13, and 2025.1 through 2025.1.2. No public exploit code exists and EPSS stands at 0.03% (9th percentile), indicating no current widespread exploitation activity.
Technical ContextAI
WatchGuard Fireware OS (CPE: cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*) is the embedded operating system powering WatchGuard network security appliances, including Firebox UTM devices. The vulnerability resides specifically in the ConnectWise Technology Integration module - a web-based component that enables integration with ConnectWise remote management platforms. CWE-79 (Stored XSS) indicates the application fails to sanitize or encode attacker-controlled input before persisting it and later rendering it in HTML responses. Unlike reflected XSS, stored XSS persists across sessions, meaning a single injection by a privileged attacker can repeatedly execute against any user who visits the affected page - including other administrators - without further attacker interaction after the initial write.
RemediationAI
Consult the WatchGuard vendor advisory at https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00022 for patched release versions; no specific fixed version numbers are provided in the available intelligence data, so direct confirmation from the advisory is required before upgrading. As a compensating control, disable or remove the ConnectWise Technology Integration module if ConnectWise integration is not operationally required - this eliminates the vulnerable attack surface with no impact to core firewall functionality. Additionally, restrict web management interface access to a dedicated, isolated management VLAN and enforce role-based access control to limit the number of high-privileged accounts that could inject a stored payload. Monitoring web management audit logs for unexpected configuration changes in the ConnectWise module can aid in early detection.
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External POC / Exploit Code
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